• Register
PhysicsOverflow is a next-generation academic platform for physicists and astronomers, including a community peer review system and a postgraduate-level discussion forum analogous to MathOverflow.

Welcome to PhysicsOverflow! PhysicsOverflow is an open platform for community peer review and graduate-level Physics discussion.

Please help promote PhysicsOverflow ads elsewhere if you like it.


PO is now at the Physics Department of Bielefeld University!

New printer friendly PO pages!

Migration to Bielefeld University was successful!

Please vote for this year's PhysicsOverflow ads!

Please do help out in categorising submissions. Submit a paper to PhysicsOverflow!

... see more

Tools for paper authors

Submit paper
Claim Paper Authorship

Tools for SE users

Search User
Reclaim SE Account
Request Account Merger
Nativise imported posts
Claim post (deleted users)
Import SE post

Users whose questions have been imported from Physics Stack Exchange, Theoretical Physics Stack Exchange, or any other Stack Exchange site are kindly requested to reclaim their account and not to register as a new user.

Public \(\beta\) tools

Report a bug with a feature
Request a new functionality
404 page design
Send feedback


(propose a free ad)

Site Statistics

205 submissions , 163 unreviewed
5,054 questions , 2,207 unanswered
5,347 answers , 22,720 comments
1,470 users with positive rep
818 active unimported users
More ...

  Solving numerically the equation of motion of D7 brane perturbation

+ 5 like - 0 dislike

I want to solve this equation

$$ \partial_{\rho}^{2}\phi+\frac{3}{\rho}\partial_{\rho}\phi+\left(\frac{M^{2}}{(1+\rho^{2})^{2}}-\frac{l(l+2)}{\rho^{2}}\right)\phi=0 $$


I know that this equation can be transformed into the hypergeometric equation through the transformation $$ \phi(\rho) = \rho^l (1+\rho^2)^{-\alpha} P(\rho) $$ (in which $P$ is some function) whose exact solution is the well known function see here $$ _2 F_1(a,b;c;\rho) = \sum_{n=0}^\infty \frac{(a)_n (b)_n}{(c)_n} \frac{\rho^n}{n!}. $$

The crucial characteristic of this function is that if $a$ or $b$ are negative integers, then the series is finite.

However, I'm interested in exploring a numerical solution for this equation and I would like to know how to obtain numerically the finite series solutions.

Any idea?


This post imported from StackExchange Mathematics at 2015-05-09 14:49 (UTC), posted by SE-user miguelFe
asked Nov 25, 2013 in Computational Physics by miguelFe (50 points) [ no revision ]
retagged May 9, 2015
You might want to try Math SE. Take a look at the non-linear example here: en.wikipedia.org/wiki/…

This post imported from StackExchange Mathematics at 2015-05-09 14:49 (UTC), posted by SE-user user6972
You might be able to identify the form/solution with this book books.google.com/…

This post imported from StackExchange Mathematics at 2015-05-09 14:49 (UTC), posted by SE-user user6972
To clarify, $\phi = \phi(\rho)$? On what interval do you wish to solve the D.E.? What restraints do you have on $M$ and $l$?

This post imported from StackExchange Mathematics at 2015-05-09 14:49 (UTC), posted by SE-user Kyle

Your answer

Please use answers only to (at least partly) answer questions. To comment, discuss, or ask for clarification, leave a comment instead.
To mask links under text, please type your text, highlight it, and click the "link" button. You can then enter your link URL.
Please consult the FAQ for as to how to format your post.
This is the answer box; if you want to write a comment instead, please use the 'add comment' button.
Live preview (may slow down editor)   Preview
Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
If you are a human please identify the position of the character covered by the symbol $\varnothing$ in the following word:
Then drag the red bullet below over the corresponding character of our banner. When you drop it there, the bullet changes to green (on slow internet connections after a few seconds).
Please complete the anti-spam verification

user contributions licensed under cc by-sa 3.0 with attribution required

Your rights